While watching a show on torture devices on the History Channel tonight it occured to me that disfellowshipping is really a form of psychological torture. Interestingly it has been shown that torture does not guarantee accurate information. Confessions extracted by torture are routinely thrown out in our legal system because of this. Given enough time any confession can be extracted. In the same way, many people apply for reinstatement. Watchtower uses this as proof that df'ing is right. But as with physical torture, it doesn't mean that these people have come around to Watchtower's way of thinking.
Additionally, just as the psychological effects of physical torture can remain with the victim for the rest of his/her life, many never fully recover from experiences with this particularly cruel part of dubdom. Which incidentally accounts for much of the anger expressed regarding Watchtower who have the power to stop this treatment.